TOPCOAT® 177 UHCR (Ultra High Corrosion Resistant) is an in house developed intermediate coating. This nickel based superalloy's main purpose is to attain optimum corrosion resistance in highly chemical environments with high temperatures. This coating is also tough, quite easily finishable, and relatively hard (Hv 500-600) leading to good wear resistance.

All things combined this makes for a coating that is well suited for piston rods of cylinders that are not heavily used but that do require high reliability in severe conditions. The bond strength of the coating to the product is excellent. The coating can also be used as a single layer top coating, providing an inexpensive alternative for Inconel 625 laser cladded coatings.

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Used technique

HVOF spraying

HVOF spraying

When HVOF (High Velocity Oxygen Fuel) spraying fuel and oxygen are ignited. The flow of gas expands through a special nozzle and reaches a speed of more than 1,500 m/s. The coating powder is injected axially in the gas flow reaching extremely high…


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